NDC quizz
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Dernière actualisation : 11 décembre 2023
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Informations additionnelles concernant ce quiz >>
| Première soumission | 9 décembre 2023 |
| Nombre de tentatives | 8 |
| Score moyen | 83,3% | Signaler ce quiz | Signaler |
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1.
What's not a advantage for bus topology ?
no collision
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scales well
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ease of install
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inexpensive
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Advantages: 1. shortest cabling requirements 2. inexpensive 3. scales well 4. Ease of installation Disadvantages: 1. Slow (shared lines) 2. collisions 3. Latency 4. Not robust 5. Single point of failure 6. Difficult to reconfigure (add/remove a node) 7. Difficult to identify and isolate faults
2.
What is a bridge ?
it doesn't exist
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it is a device that is used to make link between two networks
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it is a device that is used to regenerate a frame and forward it or discard it.
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it is a device that is used to regenerate a digital signal.
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3.
What is a router ?
it's a device used to regenerate signal
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it's a device that connects two or more networks
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it's the central device for all type of network
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it's a device two make a link between two other device
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4.
What is NOT true about the star topology ?
it can grows into Tree topology
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have dedicated lines
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it's robust
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we can have collisions
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5.
With which media we can have a bigger quantity of data ?
Fiber optics
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satellite
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6.
What's NOT true about delay distortion ?
different signal components travel at different speed
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some bit can overtake other
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can be addressed using amplifiers/repeaters
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7.
What's the bandwidth of a signal ?
the time needed to do 1 cycle
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The number of cycle in one second
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The difference between the maximum frequency and the average frequency
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The spectrum of a signal is the range of frequencies inclued in that signal.
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8.
Which one is false ?
C = B * log_2 (M)
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C = B * log_10(1+SNR)
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C = 2*B*log_2(M)
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C = B * log_10(1+ (signal power / noise power))
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9.
The generator polynomial P=x^5 + x^3 + x gives :
11111011101
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1010101
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101010
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10101
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10.
A CRC generator is used to :
divide data into small group
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correct a corrupted data
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check if there is an error in the receive message
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add some information at the end of the data
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11.
What is encapsulation is the context of ISO/OSI model ?
the fact that in the data link layer doest not know how the data is structured
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how data is arranged in term of header, body....
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how data is sent to the receiver
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how data is compressed
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12.
What ISO OSI/RM stand for ?
International Organization for Standardization Open System Interconnected Reference Model
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International Organization for System Open Standardization Internetwork Reference Model
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Interconnected Open for System of International Organization Standard Reference Model
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